Improvement in slate-frames



@nicht @dimite WILLIAM A; WILDE, OF MALDEN, MASSACHUSETTS.

Leners Paten: No. 98,653, dated January 4, 1870.

IMPROVEMENT m' SLAM-FRAMES.

The Schedule referred to in these Letters Patent and making part-ot thesame.

I', WILLIAM A. WILBE, ol Malden, in the county of Middlesex, and State0f Massachusetts,.have invented an Improvement in School-Slategof whichthe following is a specification.

Nature and Object of the Invention..

It is made, by fastening into all the corners of the lslate-frame, anoblong piece of India rubber, or other soit and elastic substance, asrepresented in the drawings hereto annexed, so that in whatever positionthe slate-frame may be, whether sitting up edgewise, on the ends orsides, or lyingtlatwise upon the bench or fd'esk, the bearing will bewholly upon saidoblong Description of the Accompanying Drawings.

Figure lis a. view of the slate and frame contains K ing my invention, as it lies tlatwise upon the desk or.

table.

Figure 2 is view of one of tbe sides of the oblong piece-of rubber, orother soft and elastic substance, which bears against one side of thegain cut in the corner of the slate-frame, where it isinserted.

Figure 3 is a. view of the outer end of said piece of Y rubber, or othersoft and elastic substance, when in- 'serted, for use, in the comers ofthe slate-frame.

General Description.

A is the slate, and B, the frame of it, in common usein schools.

O is the oblong piece of India rubber, or other solt'tv and elasticsubstance, which may be used, made-a little larger in diameter than thethcknessof the sla'tef frame, and one-half to three-quarters of an inchlong, rounded on the outer end'and sides, on which the bearings comewhen inserted in the cornersA of the slate-frame for use, as hereinafterdescribed, and slightly grooved, lengthwise, on the other two sides, toaid inholding it in place when thus inserted. y.

Y is a wooden or metallic pin, running throughthe corners of theslate-frame and said piece C, to aid-in` holding the frame together,andsad piece O in place.

In order to put said piece O in the corners of'the slate-frame, asdesigned, an' oblong gain is cut in the I corners ofthe frame, extendinglengthwise toward theY slate, and'of such size and shape that said pieceG will titin it, leaving the outer end projecting alittle ,d Y' 'Ybeyond the outer edges of the slate-frame,sothat when said piece C isinserted, and the slate-frame is setup edgewise, on its ends, or sides,or corners, th bearing will be wholly on said pieces O.'

When-said. gains are thus out in the slate-frame, all there is to be`done to complete it with my invention, is to insert said pieces C insaid gains, and fasten them by. putting the wooden or metallic pinYfthrough the corners of the frame and said pieces C Claim.

' I claim, as my invention- The piece O, made of India. rubber, or othersoit and elastic substance, as combined withv the slate` frame B, and ofthe shape and form above described.

WM. A. WILDE.

Witnesses:

L. W. Howes, E. B. SMITH.

